- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
Use of copper or copper-alloy plates coated with enough mercury to form a soft adherent film, in order to trap gold from crushed ore pulp as it flows over the plates. The resulting amalgam, containing up to 40% metallic gold, is periodically scraped off and more mercury is added to the film.
Industry:Mining
Use of electrolytic polishing to complete the finish on metal surfaces. After mechanical polishing they are made the anodes in a suitable electrolyte.
Industry:Mining
Use of flowing water or slow settling fluids based on water mixed with suitable heavy minerals to convey rock, coal, etc., in pipes.
Industry:Mining
Use of high-temperature flame to fuse rock in drilling. Heat comes from ignition of kerosene with oxygen or other fuel system, at bottom of drill hole, and water with compressed air may be used to flush out the products.
Industry:Mining
Use of portable Geiger-Muller apparatus for field detection of emission count in search for radioactive minerals.
Industry:Mining
Use of the smallest feasible drill hole and casing size.
Industry:Mining
Used as a pigment. It is the whitest of all pigments; permanent, not poisonous, but lacks the opacity and covering power of white lead or titanium dioxide.
Industry:Mining
Used as an electrolyte to transform coal into a tan-gray substance with a relatively high hydrogen-to-carbon ratio.
Industry:Mining
Used as depressant in flotation process. Alkaline starch (starch dissolved in dilute sodium hydroxide) is a flocculating agent used in purifying the water in coal-cleaning plants. Also known as amylum.
Industry:Mining
